Permutation lock



May 10, 1932. U P|AGNER| 1,857,399

PERMUTATION LOCK Filed Jan. 13, 1930 A TTORNEYS.

Patented May 10, 1932 UNITED STATES PATENT` OFFICE PERM'UTATION LOCKApplication led January 13, 1930. Serial No. 420,360.V

This invention relates to locks and especially to a padlock providedwith a permutation locking mechanism.

The object of the present invention is to f generally improve andsimplify the construction and operation of padlocks; to provide apadlock having a bolt slidably mounted on one end of the padlock housingand exterior thereof; to provide permutation actuated 19 means forlocking or releasing the bolt; and further, to provide a hasp which ispivotally attached to the bolt and movable in unison therewith to lockor release the free end of the hasp.

The padlock is shown by way of illustration in the accompanyingdrawings, in which- Fig. 1 is a central vertical longitudinal section ofthe padlock showing the bolt and hasp Z0 in locked position.

Fig. 2 is a vertical cross section taken on line fI-I of Fig. 1,

Fig. 3 is a section similar to Fig. 1 showing the bolt and the hasp inreleased or unlocked position,

Fig. 4 is an enlarged cross section taken on line lV-IV of Fig. 1,

Fig. 5 is a side elevation of thepadlock,

Fig. 6 is a bottom view of the adlock, and

Fig. 7 is a perspective view ofj the locking plate.

Referring to the drawings in detail and especially Figs. 1 to 5,inclusive, A indicates in general a padlock housing provided with abottom section, two end sections 3 and 4, and

side sections 5 5. Extending.longitudinally through the housing andcentrally thereof and secured in the end sections 3 and 4 is a pin orbar 6 on which is slidably mounted a bolt 7. Pivotally mounted on oneend of the bolt as at 8 is a hasp 9 and formed on the free end of thehasp is a latch 10 which is adapt-ed to interlock with a keeperA 11formed on the upper end of the end section 3.

The bolt 7 and the hasp 9 normally assume the position shown in Fig. 1where the bolt is locked against sliding movement and the hasp againstpivotal movement. Means are, however, provided for releasing -the boltand the hasp so that they may assume the position shown in Fig. 3 wherethe latch 10 on the hasp is out of alignment with the keeper so that thehasp may be opened or swung about its pivotal supportl 8. The lockingmechanism employed in the present instance consists Vof a plate such asindicated at 13, see-Figs. 1, 2, 3 and 7, in which are secured a pair ofpins.V These pins extendthrough opposite faces of the plate, the upperends of the pins indicated at 14 normally extending into recesses 15formed in the lower face of the bolt. The lower ends of the pins extenddownwardly from the plate and are provided with lugs 16 which areadapted to register with slots 17 formed in the hubs 18 of permutationdiscs or wheels to be hereinafter described. The plate 13 is alsoprovided with a downwardly extending central pin 19, the upper end ofwhich is enlarged and threaded as at 20. The pin 19 extends into asleeve 21 journalled in the bottom plate 2 of the lock housing and theupper end of the sleeve is enlarged and internally threaded to receivethe threaded member 20. The threaded member 20 is maintained inengagement with the upper end of the sleeve at all times by means of apair of spring pressed plungers 22 carried by the bolt and engaging theu per face of the plate 13. The lower end o the sleeve 21 is providedwith a knurled head 23 whereby it may be rotated. If the knurled head isrotated in one -direction sleeve 21 will be rotated in the samedirection as it is secured thereto and the threaded member 20 will beengaged and plate 13 will be pulled downwardly against the sleeve 21sopas to assume the depressed position shown at 13a in Fig. 3. In thisposition the upper ends 14 of the pins are withdrawn from the de-Vpressions 15 in the lower face of the bolt and the bolt is thus free sothat it may be moved along the rod 6 to assume the position shown inFig. 3, therebyreleasing the latch 10 with relation to the keeper 11 andpermitting the hasp to be swung open about its pivot 8.

Any suitable meansmay be employed for locking the plate 13againstvdcpression. Per-` mutation actuated means are shown in thepresent instance and it is' best illustrated'in Figs. 1, 4 and 6.Secured in the lower end of the lock housing are pins 26 and journalledthereon are the hub members 18. Adjustably secured to the hub members bymeans of screws 29 are discs 30 and 31. The peripheral faces of thediscs are numbered as shown in Fig. 6 and certain numbers must alignwith pointer 32 when the slots 17 formed on the hub members 18 registerwith the lugs 16 formed on the lower ends of the pins. There are twopairs of discs and hub members as shown in'F ig. 1, and each disc ineach pair is independently rotated hence requiring that all discs areproperly adjusted before the several slotted -hubs align with the lugs16. When this alignment is attained knurled nut 23 is rotated in thepro-per direction. The threads 2O of the pin 19 are then engaged and theplate is pulled downwardly into the depressed position shown at 13a, seeF ig. 3. If it is desired to lock the hasp it is merely swung down tothe position shown in Fig. 3 and the hasp and the bolt are then movedlongitudinally towards the right on the rod 6 to assume the positionshown in Fig. 1. Nut 23 is then rotated in the opposite direction andthe plate 13 will thus be'raised and demand.V `,This change canthestructure here shown pins 14 projected into the depression 15. One orall of the permutation discs are then slight,- ly rotated so as to bringthe slots 17 out of alignment with the lugs 16 and the hasp and .boltare then locked, as plate 13 together with the locking pins carriedthereby cannot be retracted or depressed until the permutation discsVare again properly positioned. The bolt by being mounted on the .upperend of the housing has the appearance of forming a part of the lockhousing and to this extent Y Vcomplicates the operation of opening thelock.

That is, any unauthorized person even though capabley of properlysetting the permutation discs might not be able to open the `lock as hemight not discover that it would be necessary to slide the upper end ofthe housing before the hasp can be opened;

An important feature of the present invention is accordingly bolt whichcarries the hasp and which is mounted on the upper end of the housing soas to make it appear asa part of the lock housing. Another importantfeature Vbeing that of providing a bolt which must be movedlongitudinally and which carries the hasp so that the hasp cannot bereleased until the bolt has been' released.

It was previously stated that the permutation discs 30 and 31 weresecured to the hub members 27 and 28 by means of screws such as shown at29. The purpose of so securing the permutation disc is to permitadjustment thereof with relation to the hub members, or in otherkwo-rds, changing of thev permutation fromtime to timeas conditions maybe accomplished without removal that y of vproviding aof any parts andis accomplished as follows: Formed in the side plates 5 of the lockhousing are a pair of openings such as shown at 5a, see Figs. 4 and 5,and forming a part of the sliding bolt 7 and extending downwardlytherefrom are a pair of side plates 7 a. These plates are also providedwith notches or openings such as shown at 5b. The plates 7 a move inunison with the bolt 7 when this is released and the openings 5b formedtherein will register with the openings awhen the bolt is moved to therelease position shown in Fig. 3. It is then only necessary to rotatethe permutation discs 30 and 31 until the heads of the screws 29register with the openings 5a and 5b. A screw driver may then beinserted and the screws 29 slackened sufficiently to permit the discs 30and 31 to be rotated on the hub members, thus changing the combination.If the discs have been re-adjusted the screws 29 are tightened, thesliding bolt is moved backY to locking position and is there locked byunscrewing the knurled nut 23. lVhen the sliding bolt is moved back tolocking position the openings 5b in the side plates 7 a have moved outof register with the openings 5a and the heads of the screws 29 are thuscovered so that no unauthorized person can have access to release them.or re-adjust them.

A permutation lock has accordingly been provided which permits changingof the combination or the permutation when the lock is released. Furthera permutation has been provided in which the combination or permutationcan not be changed except by an authorized person as it can only bechanged when the lock is unlocked.

While certain features of the present invention are more or lessspecifically described, I wish it understood that various changes may beresorted to within the scope of the appended claims. Similarly, that thematerials andv finishes of the several parts employedY may be such asthe manufacturer may decide, or varying conditions or uses may demand.

Having thus described my invention, what I claim and desire tofsecure byLetters Patent is- 1. InV a lock, ahousing, a bolt slidably mountedonthe housing transversely thereof,ra hasp pivotally attached to thebolt, a latch on the free end of the hasp, a keeper on the housing whichthe latch normally engages, and locking means retaining the latch inengagement with the keeper, said locking means when unlocked permittingsliding movement of the bolt, the away from the keeper. A

Y 2. In a lock, a housing, mounted on the housing and a hasp pivotallyattached to on the free end of the hasp, the housing engageable with abolt slidably exterior thereof, the bolt, a latch and a keeperon saidlatch when hasp and the latch l liso the bolt and hasp assume oneposition and releasing the latch when the bolt and hasp are moved awayfrom the keeper.

3. In a lock, a housing having end walls, a keeper on the housing, a barsecured bctween the end walls, a bolt having a limited lengthwisesliding movement on said bar, a hasp pivotally mounted on the bolt andmovable in unison therewith, a latch on the free end of the hasp andengageable with the keeper on the lock housing, said latch beingreleased with relation to the keeper when the bolt and hasp are moved onthe bar away from the keeper, and means for locking the releasing boltand hasp against sliding movement on the bar.

4. In a lock, a housing having end walls, a keeper on the housing, a barsecured between the end walls, al bolt having a limited lengthwisesliding movement on said bar, a hasp pivotally mounted on the bolt andmovable in unison therewith, a latch on the free end of the hasp andengageable with the keeper on the lock housing, said latch beingreleased with relation tothe keeper when the bolt and hasp are moved onthe bar away from the keeper, a plate vertically movable in the housing,said plate having a. pair of pins projecting from its upper face andinto recesses formed in the bolt and normally locking the bolt againstsliding movement on the bar, and means for locking the plate againstvertical movement to prevent retraction of the pins from the recesses ofthe bolt.

5. In a lock, a housing havingend walls,la keeper on the housing, a barsecured between the end walls, a bolt having a limited lengthwisesliding movement on said bar, a hasp pivotally mounted on the bolt andmovable in unison therewith, a latch on the free end of the haspI andengageable with the keeper on the lock housing, said latch beingreleased with relation to the keeper when the nbolt ing the bolt againstsliding movement on the bar, permutation actuated means normallymaintaining the plate in raised position and the pins against retractionfrom the depressions in the bolt, said permutation means also adapted tobe positioned to permit depression of the plate and the pins, and othermeans engageable with the plate to cause depression thereof inretraction of the pins from, the bolt. f

7. Ina lock, a housing, a hasp member mounted for transverse and pivotalmovement thereon, a latch on the free end of the hasp and normallyengaging a keeper on the housing, said latch being released withrelation to the keeper when the hasp is moved transversely on thehousing, and means normally securing the hasp against transversemovement. p

8. In a lock, a housing, a pair of hub members journalled therein, saidhub members having recesses, locking pins movable into and out of therecesses in the hubs, a pair of permutation discs carried by the hubmembers, screws adjustably securing the discs to the hubs, said lockhousing having openings formed therein with which the screws are adaptedto align when the discs are rotated, a bolt slidably mounted in thehousing and adapted to be locked or unlocked by the locking pin, and aplate carried by the bolt and closing the openings in the lock housingwhen the bolt is locked so as to prevent changing of the permutationdiscs.

9. In a lock of the character described, a lock housing, a bolt slidablymounted therein, a permutation actuated mechanism for locking orreleasing the bolt, said housing having openings formed therein throughwhich the permutation mechanism may be adjusted to change thecombination of the lock, and means carried by the bolt and cove-ringsaid openings when theV bolt locked to prevent the

